Power supply unit and dc conversion module

A direct-current (DC) conversion module comprising:

• a first main circuit board comprising a first plug port and a second plug port, and
• two first circuit boards respectively plugged into the first plug port and the second plug port, and each of the two first circuit boards comprising:
• a first primary-side circuit comprising a first switch bridge arm an inductor trace and an inductor core, and the inductor core sleeved on the inductor trace to serve as a resonant inductor,
• a first secondary-side circuit, and
• a first transformer comprising a first primary-side trace, a first secondary-side trace, and a first iron core, and the first iron core sleeved on the first primary-side trace and the first secondary-side trace to serve as the first transformer, and
• a first controller coupled to the first switch bridge arm, and configured to provide a plurality of first control signals to control the first switch bridge arm,
• wherein a phase difference between the first control signals is 180 degrees, and the two first circuit boards are coupled to each other through the first plug port and the second plug port to form an interleaved DC conversion module, and
• wherein the first primary-side circuit of each of the two first circuit boards are a half-bridge structure, the inductor traces of the first circuit boards and the first primary-side traces form a series-connected structure through the first main circuit board, and the first primary-side circuit of each of the two first circuit boards form a parallel-connected structure through the first main circuit board.